Jawaban:

1.Let's solve for x.

x+y−2z=5

Step 1: Add -y to both sides.

x+y−2z+−y=5+−y

x−2z=−y+5

Step 2: Add 2z to both sides.

x−2z+2z=−y+5+2z

x=−y+2z+5

Answer:

x=−y+2z+5

2.Let's solve for x.

2x+y−z=10

Step 1: Add -y to both sides.

2x+y−z+−y=10+−y

2x−z=−y+10

Step 2: Add z to both sides.

2x−z+z=−y+10+z

2x=−y+z+10

Step 3: Divide both sides by 2.

2x

2

=

−y+z+10

2

x=

−1

2

y+

1

2

z+5

Answer:

x=

−1

2

y+

1

2

z+5

3.Let's solve for x.

x−y−z=10

Step 1: Add y to both sides.

x−y−z+y=10+y

x−z=y+10

Step 2: Add z to both sides.

x−z+z=y+10+z

x=y+z+10

Answer:

x=y+z+10